I'm kind of newbie in this topic.I have a Home Theatre Sony Muteki HT-DDW5500I can connect to my PC the optical cable or the orange one (coaxial i think??)My mother board is Gigabyte GA-P35-DS3L and the driver for sound is Realtek HDThe problem is that I have several movies with DTS or 5.1 audio and I can't listen them that way. I tried with an audio test file and the sound is like stereo (although i set the HT to be DTS). I don't have that problem with the blueray player and I use the same cables.What can I do?